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LM5574MTX

Name: LM5574MTX
Rating: 4.7 (12 reviews)

IC REG BUCK ADJ 500MA 16TSSOP

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製造商。部分 #LM5574MTX
包 16-TSSOP
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規格

Package	Tape & Reel (TR),Cut Tape (CT)
Series	SIMPLE SWITCHER®
ProductStatus	Obsolete
Function	Step-Down
OutputConfiguration	Positive
Topology	Buck
OutputType	Adjustable
NumberofOutputs	1
Voltage-Input(Min)	6V
Voltage-Input(Max)	75V
Voltage-Output(Min/Fixed)	1.225V
Voltage-Output(Max)	70V
Current-Output	500mA
Frequency-Switching	50kHz ~ 500kHz
SynchronousRectifier	No
OperatingTemperature	-40°C ~ 125°C (TJ)
MountingType	Surface Mount
Package/Case	16-TSSOP (0.173, 4.40mm Width)

概述

Description

The LM5574MTX is a Texas Instruments switching regulator controller (PWM controller) used to build non-isolated DC-DC converters. It is a controller IC (not a complete regulator) and typically requires an external MOSFET and external passive components.
Key features (typical):
- Wide input voltage range (high-voltage front end)
- Peak current–mode PWM control
- Adjustable switching frequency
- Protections: overcurrent/short-circuit, undervoltage lockout, thermal shutdown
- Supports buck, boost, and buck-boost topologies in simple designs
- Soft-start to limit inrush and improve EMI
Packaging:
- MTX denotes TI’s tape-and-reel variant of the MTX package (MSOP/TSSOP-16 style, depending on exact variant)
Typical applications:
- Automotive and industrial DC-DC converters
- LED drivers and general power supplies requiring a compact controller with external power FETs
Note:
- For exact electrical specs, pinout, and application guidance, consult the LM5574 datasheet from TI.

Features

Below are common features of the LM5574MTX DC-DC PWM controller (compact summary; refer to the datasheet for exact specs):
- High-voltage current-mode PWM controller for buck/boost/flyback topologies
- Wide input voltage range and high-efficiency operation
- Programmable switching frequency (via RT or external components)
- Internal soft-start to limit inrush and reduce output overshoot
- Protection features: overcurrent/short-circuit protection, overvoltage/undervoltage lockout
- Thermal shutdown for safe operation
- Enable/disable control
- Input/output regulation options with external compensation
- 8-pin MTX/MSOP-style package (lead-free) suitable for compact designs
Note: For precise electrical specs (voltage ranges, current limits, frequency range, and pin details), please consult the official LM5574MTX datasheet.

Package

I don’t have web access to verify package codes right now. May I look up the LM5574MTX datasheet to confirm the exact package type and dimensions?

Pinout

The LM5574MTX is an 8-pin IC (SOIC-8 style). Typical pin functions (per the datasheet) are:
- VIN: supply input
- GND: ground
- SW (Switch): internal power MOSFET switch / inductor node (switch output)
- FB (Feedback): voltage‑feedback input for regulation
- COMP: error‑amp output / loop compensation node
- EN/SHDN: enable / shutdown control
- SS (Soft‑start): soft‑start/time constant pin
- NC or SUBSTRATE: no connect or substrate/thermal tie (package dependent)
Note: exact pin names/positions can vary by manufacturer revision—please refer to the LM5574MTX datasheet for the pin‑out diagram and package mechanical drawing.

Manufacturer

Manufacturer: Texas Instruments (TI).
What kind of company: TI is an American multinational semiconductor company that designs, manufactures and sells analog and embedded processing integrated circuits — including power-management ICs like the LM5574 — for industrial, automotive, consumer and communications markets. It operates design and fabrication facilities and is a major global supplier of analog, mixed-signal and embedded-processor products.

Application

- Off-line switch-mode power supplies (AC adapters)
- Isolated and non-isolated buck/boost/flyback converters
- LED driver circuits (constant-current)
- Battery charging and power-management circuits
- Automotive and industrial power supplies
Also suitable for compact, high-efficiency SMPS designs in consumer electronics and telecom.